https://www.ijidonline.com/article/S1201-9712(08)01008-4/ful...
https://www.cambridge.org/core/journals/epidemiology-and-inf...
https://www.ijidonline.com/article/S1201-9712(08)01008-4/ful...
https://www.cambridge.org/core/journals/epidemiology-and-inf...